Combined carpenter&#39;s square and miter-gage.



C. F. BENJAMIN.

COMBINED CARPENTERS SQUARE AND MITER GAGE.

APPLICATION FILED MAYIO. 1915.

1 1 7 1 ,765, Patented Feb. 15, 1916.

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UNITED STATES rumiiazi rr orn on.

CLARENCE r. BENJAMIN, F MILFORD, CONNECTICUT.

COMBINED CARPENTER"S SQUARE AND MITER-GAGE.

' i To all whom it may concern:

Be it known that I, CLARENCE F. BENJA- MIN, a citizen of the United States, residing in the town of Milford, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Combined Carpenters Squares and Miter- Gages; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to certain new and useful improvements in combined carpenters squares and miter gages, and pertains more particularly; to a folding rule capable of being utilized as a square and miter gage and wherein the pivotal sections are adapted to be retained in any angular relation, and it has for its primary aim to provide a rule of the above character embodying novel means for fixedly adjusting the rule sections in anypredetermined relation. 7 j V The invention further aims to produce such a device whereby accurate adjustments may be obtained in a facile manner.

Further objects, with therforegoingyare attained by the construction illustrated on the accompanying drawing and described in features, arrangements and combinations of parts on which protection is desired will be pointed out succinctly in the appended claims. w j i In the drawings: Figure 1. is a fragmentary elevation of a rule embodying the preferred form of the invention; Fig. 2 is a sectional view thereof with rulejsections in.

opened or angular position, one, rule section being in partial elevation; Fig. 3 is a transversesection on line 3-3 of Fig. 2; and Fig. 4 is a fragmentary view in partial section showing the application of the brake means. 2 Using similar characters of reference to designate corresponding parts throughout, the numeral 1 refers to onerule section having the spaced side plates 2 supporting therebetween the circularhead 3 which is formed with a peripheral series of predetermined spaced notches 4.

Numeral 5 designates the component rule section embraced by side plates 6 which receive the circular head 3 and are pivotally secured thereto by pin 7, in a convenient manner. V

the following specification, while the salient Specification of Letters Patent. A Patented Feb. 15, 1916. Application filed May 10, 1915. Serial No. 27,138; V i

Pivoted between the side plates 6 on pin 8 1s a locking device preferably formed of yieldable or resilient material and. compris-f' inga pawlor latch 9 on one terminal adapted to enter the peripheral notches 4, andfa canrformation 10 on the opposite terminal port on-and on the opposite side of the pivot.

pin 8. The latch 9 extends backwardly alongside of or into proximity tothe body,

portion of the locking device and is joined to the latter by a neck llwhereby the latch is.

adapted for yielding or resilient movement. The latch is provided with a'threaded opening through which an adjusting screw 12 passes for, bearing on the'opposing face or edge of the body of the locking device, as at 13. By advancing or withdrawing the'screw 12 the latch 9 will accordingly be swung ,from ortoward the lock body; Therefore,

small'inaccuraciesin the angular relation of the two rule sections may be easily corrected by regulating the screw 12 to thrust the pawl against the-wallsof the notch in either direction. Adjacent the bend or neck 11, the locking device is enlarged and provided with: a knurled surface 14 to facilitate the removal of thelatch from a notch against the action of a leaf spring 15 which is fixed 1n the rule section 5 and formed with a flat portion 16 adapted. to, engage with a corre 'spondingly contoured face 17 of theneck 11, when the locking device is in normal inoperative position, to retain the latter from accidentally jostling out of position.

In proximity to the periphery of the head or disk '3 is a resilient finger or'brake shoe 18 which is adapted to be engaged by the cam 10 of the locking device to force the shoe into frictional contact with the periphery of head 3, this locking means being employed when the operator wishes to adjust the rule sections at an angular relation not obtain-' able by the latch and notches, as when a notch is not registering with the latch. The cam is operated by pulling or swinging the locking device backwardly from normal position asshown in Fig. 4. Thus, the locking device serves as a single means for applying thebrake shoe, and throwing in the latch. The resilient brake shoe is fixed at one endportion between the side plates 6 by rivet 19 and is preferably formed withan extension, 20 rwhich constitutes a wall for the chamber 21in which the locking device is housed. I p

Upon increasing the angular relation between the rule sections, the latch 9 will antomatically retract from the notch but on tending to decrease the angular relation the latch will tend to enterthe notch deeper, this being a noteworthy fact since a carpenter invariably marks along the outside edge of his tool.

It sometimes happens that an acute bevel is desired thereby necessitating contraction of the rule sections to almost closed position. In order that the operator may have access tothe pawl, the abutting edges of the upper plates 2 and 6 are cut out,ras at 22, and the locking device provided with a pin 23 whereby the locking device maybe operated to move the latch 9 or cam 10. The abutting face of section ,1 is provided with a pocket 24 between its side plates 2 to receive the projectinglocking device therein and permit of the rule folding compactly.

What is claimed is:

1. An instrument of the character described comprising pivotally connected sections, one section being formed with a series a .of notches, and a locklng device pivoted on the other section and including a latch adjustable on the device and adapted to engage in a. notch of 'thefirst section and means for adjusting the latch.

2. An instrument of the character described comprising pivotally connected sections, one section being formed with a series of notches, and a locking device movably mounted on the other section and including a yieldable latch adapted to engage in a notch of the first section and means for adjusting the yieldable latch of'the locking device. I

8. In an instrument of the character described, movably connected sections, one of which is provided with a series of notches, means on the other section toengagein the notches of the first section to retain-the sections in fixed. adjustment, other means on the, other section for lockingthe sections in fixed adjustment, and a common operating means for the aforesaid means.

4. An instrument of the character de-' scribed comprising pivotally connected sections, one section being formed with. a series of notches, and a locking device movably mounted onthe other section and comprising a body portion and an integral. latch extending alongside of the body portion of the locking device, and a screw member car.- ried'by the latch and adapted to bear on the body of the locking device for adjusting the, latch.

5. An instrument ofjthe character de* scribed comprising pivotally connected sections, one section of which has a series of notches therein, a locking device pivoted on the other section and adapted to engage in a notch of the first section to hold the sections in" fixed angular-"relation, said" device the other section, and means carried by the;

first specified section for moving the resilient arm into engagement normally free of the resilient arm with the other section.

7. An instrument or". the. character described comprising pivotally connected sec-' tions, one of said sections having a series of notches, .a resilient brake element carried; by the other section and adapted for:frictional. contact with the first section, and a locking device mounted on the second'sec,

tion and including a latch adapted to enter a notch of the first section and. a cam adapt-f ed tobear on the brakeelement for moving 1 i the latter, into engagement with. the first 5 section.

8. An instrumentoof the character described comprising pivotally connected sections, one section having a peripherally notched "circular head and side plates and the other section havingside platesreceiv; ing. and pivoted to the circular head of the. first section, a resilient brake'element'disposed between the side plates of the second section in proximity to the periphery of the.

circular head and adapted for frictional. con;

tact with the latter, a locking device pivoted between the side plates of the second isectlon and comprising an adjustable latch adapted to enteranotch of'the circular head, a cam adapted to bear on the brake element afor movingthe latter :into contact with the head of the'first section, and means for adjusting the latch, spring means for acting on the locking device to hold the latch in either operative or inoperative posi-c tion,'and a pin projecting laterally from the abutting edges of theside plates on one side of the instrument being cut away to receive the purchase member for operation.

9. In an instrument of the character dewhich is provided with-a series of notches,

locking device for operating the latter, the" .115 scribed, movably connected sections, one of means on the other sectionto engagein the v I notches of the first section to retain the sec:

tions in fixed adjustment, other means on=the other SQCtlOIl for locking the sect1ons,in;

fixed adjustmenh a single means for operating either of the aforesaid means, and means for holding the first and second means inoperative. i

10. An instrument of the character described comprising movably connected sections, one of which has a notch therein,'a locking device movably. carried. by the other section and comprisinga body portion-and y the latter to correct inaccuracy between the sectional relation, and means to move the latch of the locking device relative to the latter.

11. In an instrument of the character described, pivotally connected sections, a fricgaging with the other section, and positive means adapted for fixedly holding the sections at a fixed adjustment and being movably mounted on the first specified section for actuating the frictional brake.

'tional brakecarried by one section for en- In testimony whereof I aifix my signature in presence oftwo Witnesses.

CLARENCE F. BENJAMIN.v s Witnesses:

ALICE M. TRosD,

OLAUsIA M. FOWLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

